Metallisable trisazo dyestuffs



2,897,191. Patented July 28, 1959 United States Patent Ofiice 2,897,191 METALLISABLE TRISAZO DYESTUFFS Werner Bossard, Riehen, near Basel, and Rudolf Diirig, Basel, Switzerland, assignors to J. R. Geigy A.-G., Basel, Switzerland.

N Drawing. Application November 10, 1958 Serial No. 772,676

Claims priority, application Switzerland December 6, 1957 8 Claims. (Cl. 260-159) The invention concerns metallisable trisazo dyestufis which produce pure, copper-containing cellulose dyeings Which are fast to Wet and light. It also concerns processes for the production of these trisazo dyestuffs, their use for the obtention of fast cellulose dyeings as well as, as industrial product, the material fast dyed with the aid of these dyestuifs.

It has been found that valuable, metallisable trisazo dyestuifs are obtained if an amino monoazo dyestuif of the general Formula I wherein Y represents a coupled enolisable radical bound to the naphthalene radical by means of a nitrogen atom and which is of the acylacetamide or S-pyrazolone series .and contains the azo group at the a-carbon atom of the acylacetyl group or in the 4-position of the S-pyrazolone radical, and Z represents the radical of an o-hydroxy or .o-carboxy diazo-nium compound of the benzene or naphthalene series.

Advantageously, the aromatic radical A of Fomula I is a benzene ring. Compounds which contain an aliphatic sulphonyl or sulphamide group in the form of fused rings, for example an o-oxyrnethylene sulphone group or a 1.2.4-thiadiazine-1.l-dioxy ring are also regarded as belonging to the benzene series. In addition 'to the metallisable group in o-position to the azo linkage,

A contains advantageously water solubilising or water solubility promoting substitutents, in particular sulphonic acid groups, or also carboxyl groups, sulphonic acid Lamide groups including sulphamide groups derived from low organic amines and alkanolamines, or low molecular talkyl sulphonyl groups. .nents usual in azo dyestuffs can be present, for example,

In addition the other substithalogen, low alkyl, alkoxy, acylamino or nitro groups.

I.The radical B is derived from G-amino-l-hydroxynaph- -thalene-S-sulphonic acid. In the particularly valuable dyestuffs according to the present invention however, B represents the radical of a 1-(4'-aminophenyl) -5-pyrazolone coupled in the 4-position, in particular the radical of 1-(4'-aminophenyl)-3-methyl-5-pyrazolone. Advantageously the primaly amino group of the benzoyl radi-, cal is in the p-position to the carbonyl group and, in addition to the ethyl, isopropyl, butyl group, the methyl group is chiefly the low molecular alkyl group D.

The monoazo dyestuif of the general Formula I is obtained for example by coupling in an alkaline medium o-hydroxy or o-carboxy diazonium compounds of the benzene or naphthalene series with 6-(3'.4- or 4'3- aminoalkylor nitroalkyl-benzoylamino)-l-hydroxynaphthalene-B-sulphonic acids or with l-[4-(3 '.4"- or 4".3"- aminoalkylor nitroalkyl-benzoylamino)-phenyl]-S-pyrazolones and reducing the nitro group to the amino group if necessary, for example with ammonitun or alkali sulphides or hydrogen sulphides. It is often more advantageous to acylate the amino monoazo dyestufi, obtained by alkaline coupling from 1 mol of the diazonium compounds mentioned and 1 mol of 6-amino-l-hydroxynaphthalene-3-sulphonic acid or 1-(4-aminophenyl)-5-pyrazolones, with, 3.4- or 4.3-nitroalkylbenzoyl halides and then to reduce the compound obtained with ammonium or alkali sulphides.

The monoazo dyestuffs of the general Formula I are diazotised advantageously by the indirect method. Fur ther details can be seen from the examples.

In the coupling component of the general Formula II, when Y represents an acylacetamino group, it is advantageous'ly the acetoacetylamino group; end products in which Y is a S-pyrazolone radical are more fast to light. These are preferred therefore. In these and all other 5-pyrazolone rings possibly present, the 3-position can be occupied by the usual substituents such as carboxyl, carboxylic acid ester, carboxylic acid amide, phenyl or alkyl groups; however, the methyl group in this position is advantageous. For a high degree of fastness to light of the dyestuffs according to the present invention, it is favourable if the radical Z belongs to the benzene series. Apart from the metallisable group in the o-position to the azo linkage, the radical symbolised by Z can contain the other substituents usual in diazo components, forexann ple those listed above under A.

The azo components of the general Formula II are obtained, for example, by coupling o-hydroxy or o-carboxy diazonium compounds of'the benzene and naphthalene series (the benzene series again encompassing compounds having heterocyclically bound sulphonyl and sulphamide groups), with 6-acylacetylaminoor 6-(pyrazole-5-one l'-yl)-1-hydroxynaphthalene-3-sulphonic acids. The coupling is performed in a neutral to weakly acid medium, for example in the acetic acid aqueous solution of the alkali metal salts of theseiacids in the presence of alkali metal salts of lower :fatty acids.

The diazotised monoazo dyestuffs of the Formula I are coupled with the azo components of the Formula II in an alkaline medium. The trisazo dyestuffs according to the present invention are isolated by the usual methods by salting out with sodium or potassium chloride.

The new trisazo dyestuffs correspond to the general Formula IH (III) wherein A and Z each represents radicals selected from the group consisting of the benzene and naphthalene series, B represents a radical selected from the group consisting of and (1H, X and X each represents a metallisable group in -position to'the azo group selected from the group consist ing of -OH and COOH, and R represents a lower alkyl radical.

In a preferred group of dyestuffs according to the present invention, the azo linkage is in the p-position to the carbonyl group of the benzoyl radical and R is the methyl group in the m-position. Very valuable dyestufls are those in which B represents a 1-p-phenylene-3 methyl-S-pyrazolone radical coupled in the 4-position. Particularly valuable because of their good fastness to light are dyestufis in which Y is the 3-methyl-pyrazolone -one-1-yl radical. It has already been stressedvabove that A' and Z are preferably of the benzene series.

In the form of the water soluble alkali metal salts, the trisazo dyestuffs according to the present invention are red to brown powders. Depending on the composition, aqueous solutions thereof are orange to blueish red and in concentrated sulphuric acid solution the colour is red to red-brown. The new dyestuffs dye cellulose fibres direct from baths containing sodium sulphate in orange to blueish-red shades. The wet fastness properties and the fastness to light are improved by coppering on the fibre. The dyestuflis according to the present invention can also be converted in substance completely or par tially into their complex copper compounds. Partially coppered dyestufis, which also can be metallised on the fibre, can be produced on using metal-containing diazo and coupling components. The usual ,agents giving off copper can be used for coppering such as copper sul phate, copper acetate or complex copper salts of aliphatic hydroxy acids which are stable in. alkaline solution such as, for example, those of tartaric acid. Agents of this latter type can also be used for coppering during dyeing.

The following examples illustrate the invention without limiting it in any way. Parts are given as parts by Weight and temperatures are in degrees centigrade. The relationship of parts by weight to parts by 'volume is as that of grammes to cubic centimetres.

Example 1 NHO OQ-N=N 13.7 parts of Z-aminobenzene-l-carboxylic acid are diazotised in the usual way with sodium nitrite in the presence of hydrochloric acid and the diazonium compound is coupled at with the sodium salt of 37.2 parts of 6 (3' methyl 4 aminobenzoyl) -amino-1-hydroxy naphthalene-,B-sulphonicacid in 500 parts of water and obtained is salted out with 50 parts of sodium chloride, filtered ofi and washed with diluted sodium chloride so lution. The monoazo dyestuif is suspended in 700 parts of water at 10 and 4 parts of concentrated caustic soda lye, 7 parts of sodlum mtrite are then added and then 35 parts of concentrated hydrochloric acid are added whereupon the whole 1s stirred for several hours at 10-15 In the meantime, 18.9 parts of 2-am1no- 1-hydroxye benzene-4-sulphomc acid are diazotlsed with 6.9 parts of sodium nitrite and the diazonium compound is re acted at 2530 with a solution of 32.0 parts of 6-(3' methyl pyrazole 5 one 1' yl) 1 hydroxynaphtha- Table 1 a after- N 0. Amino compound A Amino compound Z coppered dyeing on cotton 1 Z-aminobenzene-Lcar- 6 nitro 2 amino 1 hybluelsh boxylic acid. droxybenzene 4 sulred.

phonic acid. 2 10 6 chloro 2 amino 1 hy- D0.

droxybenzene 4 sulphonic acid. 3 do 6 nitro 1 amino 2 hyblucdroxynaphthalene 4 sulred.

' V phonic acid.

4 do 2 amino 1 hydroxybenbluoish zene-4-ethyl sulphone. red.

5- 2 amino-l-hydroxy- 6 nitro 1 amino 2 hyruby benzene 4 methyl droxynaphthalene 4 sulred. suiphone. phonic acid.

6 do 2 aminobenzene 1 carblueish boxylic acid. red.

7 2-amino 1 -hydroxy- 2 amino 1 hydroxybenruby benzene 4 e th yl zenc-et-sulphonic acid. red. sulphone.

8 .do 6-chl0r0-2-amino-1-hy- D0.

droxybenzene 4 sulphonic acid.

9..." Z-aminobcnzene-l-car- 2 amino 1 hydroxybenblueish boxylic acid- 5 sulzene-4-methy1 sulphone. red. phonic acid.

10...- d 2 amiuobenzene 1 carredboxylic acid.

11.-.- .do 2 amino 1 hydroxybenblueish zene. red.

12..-. 2-arninobenzene-1-car- 2 amino 1 hydroxyben- D0.

boxylic acid 4 sulzcncA-sulphonic acid diphonic acid. methylamide.

13-... do 2 amino 1 hydroxybcn- Do.

zenei-methyl sulphonc.

14-.-. 2-aminobenzcne1-car- 6 nitro 2 amino l hy- D0. boxylic acid- 5-suldroxybenzene 4 sulphonic acid amide. phonic acid.

15 do 2 amino 1 hydroxyben- Do.

zene-4-sulphonic acid.

16...- do fi-fiuoro-Z-arninol-hy- Do.

droxybcnzene 4. sulphonic acid.

17.... do 5 nitro 2 amino 1 hy- Do.

droxybcnzcne.

18--.. 4-cl1l0r0-2 aminobeu- 6 chloro 2 amino 1 hy- Do.

zcne 1 carboxylic droxybenzenc 4 sulacid. phonic acid.

19 2-amino 1 hydroxy- 6 benzoylamino 2 aminoruby bcnzene-4sulphonic 1 hydroxybenzene 4 red. acid. sulphonlc acid.

20.... do 2 amino 1 hydroxyben- D0.

, zene-i-ethyl sulphonc. 2L-.. d0 2 -'aminobenzene 1 carblueish boxylic acid. red. 22-.-. Z-aminobenzene-l-car- 6 chloro 1 amino 2 hyruby boxylic acid. droxynaphthalene 4 sulred. 7 phonic acid.

| o OOH-N=N l 51 lene-3-sulphon1c acid and 20 parts of concentrated caustic soda lye 1n 300 parts of water, which solution has been acidified immediately before the coupling with 15 parts of concentrated acetic acid. The yellow monoazo dyestuff so obtained is dissolved in water by the addition of 6 parts of sodium carbonate, 20 parts of sodium bi- 16 parts of sodium bicarbonate. The monoazo dyestufi carbonate are added and the solution is cooled to 20?.

S Then the diazo monoazo dyestuif obtained above is added dropwise. On the next day, the red trisazo dyestuff is precipitated with sodium chloride and washed with diluted sodium chloride solution. After drying, it is a s soon complete. The monoaz'o dyestufi obtained is dissolved with 10 parts of concentrated caustic soda in water, 7 parts of sodium nitrite are added and, at 10, 50 parts of concentrated hydro- After some hours,

It is washed with hot diluted The dyeings have excellent fastness dark red-brown powder which dissolves in water with chloric acid are added all at once. a pure red and in concentrated sulphuric acid with a the diazo monoazo dyestutf is filtered off and washed with Bordeaux red colour. It dyes natural and regenerated cold water. cellulose fibres, on treating with copper salts in the pres- 56.8 parts of the yellow monoazo dyestufi obtained by ence of acetic acid, in pure blueish red shades which acetic acid couplingv of the diazonium compound obhave good fastness to light, washing, water, alkali and tained from 6-nitro-2-amino-1-hydroxybenzene-4-sulphonacid. ic acid with 6-acetoacetylamino-l-hydroxynaphthalene-3- Analogous dyestuffs having similar fastness properties sulphonic acid are dissolved with 10 parts of sodium are obtained if, instead of 2-aminobenzene-l-carboxylic. carbonate in 800 parts of water and 20 parts of sodium acid, equimolar amounts of the amino compound A given bicarbonate are added. The diazo monoazo compound in Table 1 are'used according to the method described obtained is then added at 10-15 while stirring Well. above, and if instead of 2-amino-l-hydroxybenzene-4 On the next day, the whole is heated to 80, 250'parts sulphonic acid, equimoiar amounts of the amino comof sodium chloride and parts of concentrated anipound Z given in Table 1 are used. monia solution are added and the precipitated trisazo Dyestufis having similar shades and fastness properties dyestufi is filtered oif. are obtained if instead of 6-(3'-methyl-4-aminobensodium chloride solution, dried and ground. The dark zoylamino)-1-hydroxynaphthalene-3-sulphonic acid, the brown-red powder obtained dissolves in water with a corresponding number of parts of 6-(3 -e thylor 3'-isored and in concentrated sulphuric acid with a red-brown propyl-4-aminobenzoylamino) l-hydroxynaphthalene-3- colour and it dyes cotton fibres, when after-coppered, in sulphonic acid are used. Y a pure red shade.

to Washing, water, perspiration and light. EXAMPLE 2 If, in the process used in the example, equimolar coon COCH-N=N a G Ho s N ('30 N=N-OHCO SOaH C=N I I OH; OH CH3 A solution of 32.2 parts of l-[4-(3"rmethyl-4"-aminobenzoylarnino) -phenyl] -3 -methyl-5-pyrazolone and amounts of the aminoazo compounds A coupled'with B named in the following Table 2 are diazotised and coupled with a yellow monoazo dyestuif from the diazotised amino compound Z and 6-acetoacetylamino-lhydroxynaphthalene-3-sulphonic acid, then able dyestuffs are obtained.

similar valu- Table 2 Middle component correspending to i I After cop- No. Amino compound A D; Amino compound Z pered l dyeing on cotton BNH-O G1),

1 2 aminobenzene 1 carbox- 1 [-4- (3- methyl 4- ami- 6 benzcylamino 2 aminored.

ylic acid-5-su1phonic acid. nobenzoyl-amino)-phenyl]- 1 -hydroxybenzene -4 sul- 3-methyl-5-pyrazo1one. phonic acid. 2 ..do .do 6 chloro 2 amino 1 hy- Do.

' droxybenzene-i-sulphonic acid. 3 2-aminobcnzene-1carbox-. (in Do.

ylic acid--sulphonic acid. p 4 6-nitro-1-amino-2-hydroxyd0 6-I11t10-2-amino-1-hydroxyblueish napihthalene 4 sulphonic benzene-4-sulphon1c acid. red. aci I 5 2-amino-1-hydroxybenzenedd Z-amino-l-hydroxyhenzcnered.

4-sulphonic acid. 1 4-n1cthyl sulphone. a d do 6-br0mo-2-amino-1-hy- Do. dr grybenzene-d-sulphonic V p aci 7 2-amino-1-hydroxybenzened0 6 chloro 2 amino 1 11y- Do.

fi-sulphonic acid. drprybcnzenct-sulphonm 4 am 8 5-nitro-2-amin0-1-hydroxydo 2-arnin0-1-hydroxybenzene- Do.

benzeneA-sulphonic acid. 4-sulphonic acid. 9 6-nitro-2 amino-1-hydroxydo 6-chl0ro-2-amino-1-hydroxy- Do.

benZene-4-sulphonic acid. benzene-i-sulphonic acid. 10 rln 6-nitro-2-amino-1-hydroxy- Do.

benzene--sulphonic acid. 11 6 fluoro 2 amino 1 hyd0 6 bcnzoylamino 2 amino- Do.

droxybenzcnei-sulphonic 1 -hydroxybenzene -4-suiacid. phonic acid. 12 G-chioro-Z-amino-l-hydroxy- .--do 6-ch10ro-2-amino-l-hydr0xy- Do.

benzene-4-sulphonic acid. bcnzene--sulphonic acid. -13 4-ch1oro-2-amiuo-1-hydroxy-' do 6 benzoylamino 2 amino- 7 Do .henzene-fi-sulphonic acid. i v 2 -;1-hydroxybenzene-'4-sul- .l

. phonic acid.

Table 2-Cont1nued Middle component corresponding to After cop- No. Amino compound A 1); Amino compound Z pered' l dyeing on cotton B-NH-C O- D;

14 2 aminobenzene 1 carbox- 6-(8-methyl-4-aminobenzo- 2-amino-1-hydroxybenzeneblueish yiic acid. y1amino)-1-hydroxynaph- 4-sulphonic acid. red.

thalene-3-sulphonic acid. 4-chloro-2-aminobenzene-1- do do Do.

carboxylic acid. 16 2 aminobenzene 1 carbox- -.do 2 aminobenzene 1 carboxred.

ylic acid-5-su1phonic acid ylic acid-5-sulphonic acid amide. amide. 17 2 aminobenzene 1 carboxdo 2 aminobenzene 1 carbox- Do.

7 ylic acid-5-su1phonic acid. ylic acid. 18 2-amino-1 -hydroxybenzeneblueish 4-cthy1 sulphone. red. 19 2 aminobenzene 1 carboxd0 do 'Do.

ylic acidi-sulphonic acid. 20 Z-amino-l-hydroxybenzene- -.do 2 aminobenzene 1 carbox- Do.

4-sulphonic acid amide. ylic acid. 21 2-amino-1-hydroxybenzenedo Z-amino-l-hydroxybenzeneruby.

4-methyl sulphone. 4-su1phonic acid. 22 6-ch10ro-2-amino-1-hydroxydo 6-chloro-2-amino-1-hydroxy- Borbenzene-4-sulphonic acid. benzene-4-sulphonic acid. deaux. 23 2-aminonaphthalene-8-cardo 2-amino-1-hydroxybenzeneblueish boxylic acid. 4-sulphonic acid. red.

EXAMPLE 3 HO 0 Celia-(I1 0 i IFH 0H C0CH-N=N N=NCHC 0 50 131 22.3 parts of 6-chloro-2-amino-1-hydroxybenzene-4- sulphonic acid are diazotised in the usual Way and added dropwise at 25 to a solution from 32.0 parts of 6-(3- methyl pyrazole 5' one 1' yl) 1 hydroxynaph thalene 3 sulphonic acid and 20 parts of concentrated caustic soda lye in 300 parts of water, which solution has been made weakly acid with 15 parts of concentrated acetic acid. After some hours, the dyestufi formation is complete. The yellow monoazo dyestuff is precipitated with 10% by volume of sodium chloride, filtered off and washed with 10% sodium chloride solu tion.

A diazoniurn compound from 30.8 parts of 6-benzoy1- amino-Z-amino-l-hydroxybenzene-4-sulphonic acid is neutralised by sprinkling in 10 parts of sodium bicarbonate and coupled with 32.2 parts of 1-[4-(3-methyl- 4" aminobenzoylamino) phenyl] 3 methyl 5 pyrazolone by adding a solution thereof with 19 parts of concentrated caustic soda lye in 600 parts of water drop Wise. The precipitated amino monoazo dyestufi is fil tered off and washed with diluted salt solution. It is adding 7 parts of sodium nitrite and, after some time,

adding 35 parts of concentrated hydrochloric acid and then stirring for several hours in the cold. 7 r

To couple to form the trisazo dyestuif, the yellow monoazo dyestuff described at the beginning is dissolvedin 1000 parts of water and 5 parts of sodium carbonate and 40 parts of sodium bicarbonate are added. The diazo monoazo dyestuff obtained is then slowly poured in. On the next day, the whole is heated to 80, 10 parts by volume percent of sodium chloride and 20 .partsor' concentrated ammonia solution are added and the precipitated trisazo dyestufi is filtered oif. After drying and milling, it is a dark, brown-red powder which dissolves in water and in concentrated sulphuric acid with a red colour. It dyes cotton and staple fibre in pure red shades which, when after-treated with copper salts, have very good fastness to washing, light, perspiration and alkali. Dyestuffs having similar properties are given in the following Table 3. They are obtained according to this example when, instead of the 6-benzoylamino-2-amino l-hydroxybenzene-4-sulphonic acid, an amino compound A is used and when instead of 6-cbloro-2-amino-1-hydroxybenzene-4-sulphon1c acid, an amino compound Z is used. Eqrulmolar amounts of both are used.

Table 3 after No. Ammo compound A Amino compound Z coppered dyeing on cotton 1. 6 benzoylamino 2 6 nitro 2 amino 1 -hyred.

amino-l-hydroxybendroxybenzene 4 suizene-4-sulph0nic acid. phonic acid.

2 do 2-aminobenzene-l -carbox- Do.

ylic acid-5-su1phonic acid.

3 do 2 amino 1 hydroxyben- Do.

zene-4-sulphonic acid.

4..-" ..do fi-benzoyiamino-Z-amino- Do.

. 1-hydroxybenzene-4-sulphonic acid.

5. do 2 amino 1 hydroxyben- Do.

zene-fi-sulphonic acid.

6..-" 6 chloro 2 amino 1 2 amino 1 hydroxyben- Do.

hydroxybenzene 4 Zene-4-methyl sulphone. sulphonic acid.

do 2 amino 1 hydroxyben- Do.

zene-4-sulphonic acid. 2 ammo 1 hydroxy- 2 -amino 1 -hydroxyben- Do.

benzene 4 sulphonio zene 4 sulphonic acid acid. amide. 9 do 2 amino 1 hydroxyben- D0.

zene 4 sulphonic acid methyl ethanol amide.

10---- do 6-ehlor0-2-amino-1-hy- Do.

droxybcnzene 4 sul' phonic acid.

11-- .do 6-nitro-1-amino-2-hy- Do.

droxynaphthalene 4 sulphonic acid.

l2 2 amino 1 hydroxy- 2 amino l -hydroxyben- Do. belnzene 4 ethyl sulzene-4-suiphonic acid.

p one. 13 do fi-nitro-2-amino-1-hy- Do.

droxybenzene 4 suiphonic acid.

14.. 2 aminobenzene 1 car- 2 amino 1 hydroxybenyellowboxylic acid. zene-4-sulphonic acid. red. .15---. 6 nitro 1 amino 2 do blue-red.

hydroxynaphthaicne 4-sulphonic acid.

16 2-aminonaphthalene-3- -do red.

carboxylic acid.

Table 3Continued 10 10 parts of sodium acetate are added to the acid, aque ous solution of a diazonium compound from 23 .4 parts of after 6-nitro-2-amino-1-hydroxybenZene-4-sulphonic acid. The No. Amino compound A Ammo compound Z goppered solution of 322 parts of y on cotton benzoylammo) phenyl] 3 methyl 5 pyrazolone I in 60 parts of water and 25 parts of concentrated 30% 17 2-aminobenzene-1-car1- 6-(nitrol-j2-aminoil-hsi- Do. caustic soda lye is pouredin at 10-15". The amino Egg-gag? 5 g g g? 1 V monoazo dyestufi formed is precipitated with 5 parts by 18- do 6-g 0l(] J- Y1- Do. volume percent of sodium chloride, filtered 01f, Washed gg g ggf 10 with a diluted sodium chloride solution and stirred in f i gggggg gg f f 800 parts of Water. After the addition of 7 parts of sulphonic acid. sodium nitrite, 36 parts of concentrated hydrochloric acid 6 gggg g gg ggi gj j are added qulckly at 19 and the whole is left to react for 21 v 5 Hit 2 1 2 ho ic Bind}; dr ben D several hours. The diazo monoazo dyestufi so obtalned -2m1n0- mmoo r hydigfiygleniene 4 zine+sulphgmc 31 is poured into a solutlon of 52 parts of the yellow monomet y s p one. 22" 6 mm 2 ammo Do azo dyestuif obtained according to Example 1 from diazo hydlipxybenhgne 4 droxylbenzenei-sulphonic tised Z-arrnno-l-hydroxybenzene-4-sulphon1c ac1d- 6-(3 sul onic ac aci I 1 7 23-.-- 2-am iuobenaene-1-car-- 2-amino-1-hydroxyben- Do. methyl pyrazole 1, yl) hydroxy' g y g igg zene-4-su1phomc acid. 2 -naphthalene-3-sulphon1c acid, 6 parts of sodium carbonate 0111 24"-- 4-:chdl-2r0 -amino 1 10 D0. a d parts of sodium bicarbonate in 800 parts of water.

y oxy enzeue. 25" cmom 2 ammoben The red trlsazo dyestufi obtamed 1S plC lp1tatd vyith zene-l-garboxylicacid. 6 cm 2 1 h D sodium chloride, filtered oif, Washed with diluted sodium 26"" z-ggn l ig 2g -g?: ggg' ggffi &1 5 chloride solution and dried. It is a dark brown powder honic acid. ph acid- 2 -wh1ch dissolves 1n water and 1n concentrated sulphurlc 27.--- do 6-bromo-1-amino-2-hy- D0, 1 1 1 (lioxynaphghalenei-sulacld with a red-orange colour. Cellulose fibres are after p onic aci 2a--.- G-chloro-Z-amino-l-hy- '6-nitro-2-amin0-1-hy- Do. WPPQIQd 1 P Ted ran es a e wy ic hav good diOXybGnZgne--Sllldioxybenzgne 4 sulfastness to Washing, water, acid, alkali and light.

1 29"" P i gg giiimwamm- 30 Further valuable dyestuffs are given 1n Table 4 which i 5583353 are obtained by this process if the compounds named in 30"-- 2-amino-1-hydrqxyben- 2-amino 1 -11]1yd roxy ben- Do. columns 1 and 2 are coupled to form the amino monoazo $ji#-'?" f fififg igi g iggiifi dyestufl? A B, this is diazotised and coupled with the y xybenz ene 4 drvxybemene 5111' yellow monoazo dyestuff which is obtained from the diazo sulphomc acid. phonic acid. v 32-.-- 2-amino-1-lh31 1droxybend- 2 -ani1)ino1%aphthialene --3- Do. 35 component Z in column 4 by coupling with the coupling -Zene-4-su p onic aci car oxy ic aci 33 2-aminobenzene-1-cardo D0. component boxylic acid 4- sulphonic acid. v

Similar dyestuffs are also obtained if the corresponding '40 number of parts of 1[4'-(3"-ethylor 3"-propyl-4"- aminobenzoy1amino)-phenyl] -3-methyl-5-pyrazolone are used instead of the 3"-methyl compound described for v H I the production of the dyestufis named in the table. I I

EMMPLE 4 in co1umn 3.' I w OH I a CO-CHN=N- i .7 o N/ t I OzN OH 801E N==G N=N N=N-oHoo I CH3 N NHC 00011. n sonar ?==N OH: I

Table 4 Diazo monoazo dyestufi fromcoupled monoazo dyestufi fromaftert-1 cgp pere ye- No. ing on amino compound A middle component B coupling component X-Y amino compound Z cotton 1 2- amino-lhydroxy-benzene- '1- [4'-(4"- methyl -3"-amino- 6-(3- methyl pyrazole -5 2-amin0-1-hydroxybenzene-4 red orange.

4-sulpl1onic acid. benzoyl-amino)-pheny1]-3- one-1-y1)-l-hydroxy-naph- I sulphonic acid. 7 i methyl-5-pyrezolone. thalenc-3-su1phonic acid. U 2 do do do 6-chloro-2-amino-1-hydroxyjDo.

benzene-isulphonic acid. i 3 z-aminobenzene-l-carboxyldo do do orange.

ic acid-5-sulphonic acid. 4 fin do do 2-aminobenzene-l-carboxylic Do.

acid-fi-sulphonic acid amide. 5 6-nitro-1-amino-2-hydroxydn (in do red orange. napthalene i-sulphonic acid.

6 6- chloro-Z- amino-l-hydroxydo do G-nitro-Ywmino 1 hydroxy Do.

benzenei-sulphonic acid. benzene-'i-sulphonic acid.- 7 do d fi-acetoacetyI-aminol-hydroxy- -.do yellowish naphthalene 3 sulphonic red.

Table 4--Continned Diazo monoazo dyestufl iromcoupled monoazo dyestufi Iromalter cop- No. v pered dyeanimo compound A middle component B coupling component X-Y amino compound Z ington co on 8 6 nitro Z amino-l-hydroxydo do 2- amino -1- hydroxybenzene-4 Do.

benzeneA-sulphonic acid. sulphonic acid. 9 2- aminobenzene -1- carboxylic dn d 6- benzoylamino -2- amino'lred orange.

acid-i-sulphonic acid. hy((i1roxybenzenc-4snlphonic 7 am 10. 2- aminobenzene -1- carboxylic 6- (4-methyl -3- aminob enzoyldo 2- amino -1- hydroxybenzene-4- red.

acid. amino)-1- hydroxynaphtha sulphonic acid. 7

lene -3- sulphonic acid. 11.--" 2- amino-l-hydroxybenzene -4 do dn d0 blueish red methyl sulphone. re 12 2- amiuonaphthalene -3- cardo rln d0 boxylic acid. 13 2- aminobenzene -1- carboxylic -.do do 6- brorno -2- amino -1- hydroxy- D0.

acid-S-sulphonic acid. -benzene-4-sulphonic acid. 14. 2- aminob enzene -1- carboxylic .do 6- (3-Inethyl-pyrazole-5-one -1 6- chloro -2- amino-l-hydroxy- Do.

acid. -yl)-1- hydroxynaphthalenebenzene -4- sulphonic acid.

3-Sulphonic acid. V 15- 2 amino -lhydroxybenzenedo do 2- aminobenzene -1- carboxylic Do.

4- isopropyl sulphone. acid 4- sulphonic acid. 16. 2- amino -1- hydroxybenzene -4- do rin 6 chloro -1- amino- 1 -hydroxyruby. snlphonic acid. naiplhthalene 4- snlphonic ac 17 2- aminobenzene -1- carboxylic 6-(4-ethy l-3- aminobenzoyldo 6- nitro -2- amino -1- hydroxyred.

acid-5-su1phonic acid. amino) -1- hydroxynaphthabenzene -4- snlphonic acid. 7

lene-3-sulphonic acid. 18- 6- nitro -2- amino -1- hydroxy- 1- [4-(4- ethyl -3- aminobendo 6- chloro -2- amino -1- hydroxyred orange.

benzene-i-sulphonic acid. zoylamino)-phenyl] -3-methbenzene-4-sulphonic acid.

yl-fi-pyrazolone. l9- 6 chloro -1- amino -2- hydroxydo dn 2-amino -1? hydroxyb enzene-4- red.

. napihthalene -4 sulphonic sulphonic acid.

aci 20 do do 6-bromo-1- amino -2- hydroxy- Do.

- napthalene-i-sulphouic acid.

EXAMPLE 5 X and X each represents a metallisable group in o-posi- Lo pan of the dyestufi obtained according to Example tion to the azo group selected from the group consisting l is dissolved in a dyebath containing 3000 parts of Water i and R repliegents a lower alkyl and 2 parts of sodium carbonate. 100 parts of'cotton radlcal Sam dyestufi contmng at most three are entered at 4050, the bath is heated within 30 minnaphthalene. radlcals utes to 90-95", 30 parts of sodium sulphate are then 7 The tnsazo dyesmfi of the formula added and dyeing is performed for minutes at this V temperature. The dyed goods are rinsed cold and after t treated in a fresh bath with 2 parts of crystallised cop- V t per sulphate in 2000 parts of water and 2 parts of 30% Boas acetic acid at '70 for 30 minutes. The goods are rinsed I I A.N=NB -NH- 0 0- -N=N- and dried in the usual way. The cotton is dyed in pure 45 bluish red shades which have good fastnessjto washing, i A water, perspiration and light. B

What we claim is: The trisazo dyesmfl of the formula wherein A and Z each represents radicals of the benzene X2 series, B represents a radical selected from the group c011 I a 1103s -Y sisting of X 4 N=N A-N=NBNH-C 0 wherein A and Z each represents radicals selected from and the group consisting of the benzene and naphthalene series, B represents a radical selected from the group con- S o H H3 sisting of 3 Q Y Y represents a radical selected from the group consistand 0=-=N (3H I H 50 E 3 j V 7 r j I v o0 c (JO-1'7 Y represents a radical selected from-the group consist N and NH 00 mg of 7 A V V N G V V V l H H 7 7077 V I/Ha i l and X and X each represents a metallisable group in C 5 o-position to the azo group selected from the group con- H I sisting of -OH and -COOH. i

2,897,191 13 14 3. The trisazo dyestutt' of the formula wherein A and Z each represents radicals of the benzene series, and X and X each represents a metallisable group in o-position to the azo group selected from the group consisting of -OH and -COO L 4. The trisazo dyestufl" of the formula I GO-CHN=N N= HO S -N/ I 0,11 N=C -NHCO N= I 5. The trisazo dyestuflf of the formula N so H l O Q 11 c H, E

6. The trisazo dyestuif of the formula 1 OH NO,

7. The trisazo dyestufl of the formula OH NO, .COOH

Hogs NHGOCHN=N N=NC 11-0 0 v I N NHCO N=N 0J5! 80311 H,

I H; H CH,

8. The trisazo dyestufi of the formula c0-oH-N=N HO; N\ o H OgN 0H N=o a l N NHCOOOH, H

SO H

No references cited. 

1. THE TRISAZO DYESTUFF OF THE FORMULA 